I have a hybrid GPU, with a discrete Radeon HD 8xxM series card, and the built in Intel card. If I use the AMD Catalyst control centre to disable the dgpu, then
sudo lshw -C VIDEO *-display description: VGA compatible controller product: Haswell-ULT Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 09 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:59 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:5000(size=64)
So I just see the one integrated card as expected, and it appears to be driven by the i915 module. But
lsmod | grep fglrx fglrx 6728820 0 amd_iommu_v2 19198 1 fglrx
fglrx is still loaded?
fglrx control both the dgpu and igpu somehow? and yet the i915 is still needed also to drive the intel built-in card too?
If I can switch in catalyst control centre, does that mean my system is "muxed"?
If I turn back on the dgpu mode in catalyst, does this exclusivley use the high performance card, or is it "dyanmic", switching when needed?